How can Samsung mobile phone gt 19508v SMS be deleted from the background?

The method of moving SMS from a secure mailbox to a message is as follows:

Enter the application-secure email-enter password-open session-menu key-move to message-check the message to be moved-move-OK, and then return to enter the message to view the mobile message.

Note: The secure mailbox password is the password you set yourself when you first open the secure mailbox.